/**
 * Unit tests for promos module — types + validation.
 */

import { describe, it, expect } from "vitest";
import { CreatePromoSchema } from "./types.js";

describe("CreatePromoSchema", () => {
  it("accepts valid percent-off promo", () => {
    const result = CreatePromoSchema.safeParse({
      code: "SUMMER20",
      percentOff: 20,
    });
    expect(result.success).toBe(true);
    if (result.success) {
      expect(result.data.duration).toBe("once");
      expect(result.data.currency).toBe("usd");
    }
  });

  it("accepts valid amount-off promo", () => {
    const result = CreatePromoSchema.safeParse({
      code: "FLAT5",
      amountOff: 500,
      currency: "usd",
    });
    expect(result.success).toBe(true);
  });

  it("accepts repeating duration with months", () => {
    const result = CreatePromoSchema.safeParse({
      code: "REPEAT3",
      percentOff: 10,
      duration: "repeating",
      durationInMonths: 3,
    });
    expect(result.success).toBe(true);
    if (result.success) {
      expect(result.data.duration).toBe("repeating");
      expect(result.data.durationInMonths).toBe(3);
    }
  });

  it("accepts promo with max redemptions and expiry", () => {
    const result = CreatePromoSchema.safeParse({
      code: "LIMITED",
      percentOff: 50,
      maxRedemptions: 100,
      expiresAt: "2026-12-31T23:59:59Z",
      createdBy: "admin@lysnr.ai",
    });
    expect(result.success).toBe(true);
    if (result.success) {
      expect(result.data.maxRedemptions).toBe(100);
      expect(result.data.createdBy).toBe("admin@lysnr.ai");
    }
  });

  it("rejects missing code", () => {
    const result = CreatePromoSchema.safeParse({ percentOff: 20 });
    expect(result.success).toBe(false);
  });

  it("rejects percent over 100", () => {
    const result = CreatePromoSchema.safeParse({
      code: "TOOMUCH",
      percentOff: 101,
    });
    expect(result.success).toBe(false);
  });

  it("rejects invalid duration", () => {
    const result = CreatePromoSchema.safeParse({
      code: "BAD",
      percentOff: 10,
      duration: "weekly",
    });
    expect(result.success).toBe(false);
  });
});